Coffer-dam and foundation.



' D. D; MOBEANL COPPER DAM AND FOUNDATION.- APPLIOATIOH rum) MAY 9, 190a.

PATENTED DEC. 1; 1903.

no menu.

PATENTED DEC. 1, 1903.

D. 1). MQBBAN. UOPFER DAM AND FOUNDATION.

APPLIGATION FILED MAY 9; 1903.

Wznesses:

* Aify PATENTED DEC. 1, 1903.

I n. D. MQ'BEAN; COPPER DAM AND FOUNDATION.

APILIOATION FILED MAY 9, 1908.

8 SHEETS-SHEET 4.-

N0 MODEL.

Wz'inesses:' pdwlwm/fnvmir Aiiy No. 745,455. PATENTED D136. 1, 1903.

D. D. MGBEAN. COPPER DAM AND FOUNDATION.

APPLICATION FILED MAYQ, 1903. N0 MODEL. 6 SHEETS-SHEET 5.

V a 1 v 1 5 W I MAWZMHZW No 745,455 PATENTED DEC.- 1, 1903.

1). DPMQBEAN. COPPER DAM AND FOUNDATION.

APPLIOATION FILED MAY 9, 1903.

N0 MO'DEL. 6 $HEETS-SEEET 6,

- fiatented December 1, 1961 DUNCAND. Mc BEAN,

or YORK, N. Y.

"'COFFER-DAM AND FOUNDATI ON.

srucmzcncrion forming part of Letters Patent No; 745,455, dated December 1, 1903.

Applicationdled May 9,1903. sesame. 156,410. on model.)

.To all whom it may concerns I Be it known'th-at I, DUNOAN DllICBEAN, of

the city, county, and State of New York, have invented. a new andusefulv Improvement in 5 Coffer-Dams andFouudationgofwwhich the following is a specification.

My'nventionrelates to improuements exnployed in the making of cofier-dams, open- ,cut excavations, and foundatiofisgwith-in or ID upon-which material is to be retained or placed or structural devices placed oi-built,

Frequently where cotter-dams, opeu cut excavations',jor foundations are require'dthecharacter of the water-bearing" material tobe I5 removed or kept in place is suchihat the,

sheeting; which forms the sides'of the cofferdam or sustains the side bank of the opencut excavation or which confines the mate- 'riaLon which the foundation is required must no be driven in place .some distance below the subgrade of the required opening in advanee of making the opening or preparing the foundation; The depth of the required'opening or of material to be confinedmay be so-great z 5 that the timber of which the sheeting is made willnot'ewithstand the pounding of the ham or required to-drive it to subgrade or -the depth of all the material in which the excavation is to be made. The advantage in using 0 in such work shootings long enough to reach from the surface to the greatest depth required instead of using short shootings with offsets is that the wall istherehy'madesmooth, and without. offsets the shootings can be driven from the surface by the use of ma- ,c inery, and they are always in position to bedriven farther, if necessary, and the structure'es a whole is much stronger. Before driving the sheetings I dredge out the site either to the full necessary depth or to such depth that the sheeting can readily be driven as far as necessary through the balance of the material. In order to provide shootings of sufficient length and so formed as to make a s5 substantially water-tight wall when united,-

I construct them in sections as composite shootings, which are covered by another applieation for Letters Patent of even date herewith. The path for such shootings is secured ioaand obstructions removed therefrom by "ineansof pilot sheetings, which are also the and supporting devices therefor; which constitute the subject-matter of this application, as hereinafter"particularly set forth, and

shown in the accompanyingdrawings, formaing part-of this specification. I In the drawings, Figured IS a cross-secsubjectmatter of auothercoucurrent appli- 'tioual elevation through a preliminary exca-w vation, showing the sheeting walls in place,- the intermediate guiding and-supporting framework,thesheetin -driver platforms, and. in dotted lines asheeting-driver. in place.

bottom. of the framework, which constitute the guides for the sheeting, being omitted to Fig. 2isa perspective view of the frameworksection, the outside walings on the top and afford a clearer view of the other parts. Fig. 3 is a perspective View showing the entire structure ready for filling behind the sheeting walls and; illustrating the use of my'invention where :su-pporting-pilesjfor the framework'are not necessary. Fig. 4 is a detail of a set of the pileswith theircross and bracing timbers. Fig. 5 is a'detailof the framework for supporting-the sheeting'walls. Fig. 6 is a longitudinal section through the framework, certain parts being removed; and Fig.

7 is aplan view of the framework and the sheeting walls whichit supports.

In the drawings, 2 represents the slope of the dredged channel; 3, the piles outside the channel; 4, the platform supported thereon for carrying the sheeting-driver 5.

9 isthe sheeting wail, and A is the framework which guides and supports the sheetings while being driven and the walls when in place.

' 6 represents the. inner walings, and 'Tthe outer walings, of the framework laterally spaced by blocks 8, the intermediate space being adapted to serve as guides for the sheetings 9 while being driven.

10 represents studs for interspacing and supporting the several walings 6.

11 represents horizontal timbers or crossbraces, and 12 diagonal braces.

13 represents longitudinally-arranged hangy ing stringers, which are bolted to the'orosstimbers 11 and serve by resting upon the pile cross-caps 14 to support the framework A thereon. I

16 represents diagonal braces bolted to the piles and to their caps 14 to brace and strengthen the same.

Themanner in which the structureis built andused is as'follows:

made as illustrated in Fig. 1, the piles 3 are driven in the slopes thereof and the platforms 4 erected thereon. The series of piles 15 are driven into the bed of the excavation and connected by their caps 14 and braces 16. The framework A then being constructed isfloated over the excavation and sunk downto and upon the piles and suitably secured thereto. Bymeans of sheeting-drivers located on the workingplatforms t sheetings 9 are then driven alongthe sides of the excavatiombeing guidedby'; the walings of the framework, the blocks 8 being successively removed to give place to the sheetings, which work thereby supporting the sheetingsfrom movement in either direction laterally.

When the structure is built for the purpose of preparing a foundation without removing the water, all of the framework except the lower tierof braces is preferably vremoved. The sheetings'are then cut off to the required grade and the foundation laid between the same and the intermediate piles.

Where the structure is built' for the purof walings and are then bolted, to thewalings, the frame-,iported thereon.

included .space and May, 1903.

2 The combination with sheeting walls on opposite. sides of an excavation, of an interposed guiding and bracing framework therefor.

3. The combination with sheeting walls on opposite sides of an diate piles anda guiding and bracing frame- Workfor said sheeting walls supported on said piles. The preliminary excavation having been 1 4. The combination with the sheeting walls,- of an intermediate framework having series serving as inner and outer guides for the sheeting and as bracing-support for the same. Y

5. In an excavation, piles in the bed thereof interconnect-ed1- by cap-pieces, and a framework supportedlupon said cap-pieces and provided with series of walings serving asgu-ides for sheeting to be driven along the sides of said excavation. 6. In anexcavatiomthe combination. of piles in the bed thereof, interconnectedjy cap-pieces and braces, and a framework of braces and .waling-guides for sheeting sup- 7. In foundation-work, series of interconnected piles in the bed of the excavation, a

framework supported thereon, sheeting walls outside said piles guided and laterally braced by said framework, said sheeting walls serviug as a mold and the embedded parts'of said piles as foundation for concrete and other.

structure. 4 I

8. In excavation-work, the combination of piles/driven into the bed of frame supported upon the same and having walings-serving as sheeting-guides, series of piles in and along the banks of the excavatially as and for the purposes set forth.

Signed at New York vcit-y this 4th vday of DUNCAN MCBEAN. 'Witnesses: r

ANNA W. MOBEAN, J. T. CRANE.

excavation, of interme-'-- the combination of the excavation, a

'tion outside the sheeting walls, and sheetingdriver platforms mounted thereon, s'ubstan-- 

